CN104901404A - Charging circuit and output control method - Google Patents
Charging circuit and output control method Download PDFInfo
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Abstract
The invention discloses a charging circuit and an output control method. The charging circuit comprises a power factor correction circuit which converts received AC parameters into first DC parameters under the control of the control circuit and outputs the first DC parameters; a resonance circuit which adjusts the first DC parameters received under the control of the control circuit to obtain output DC parameters; the control circuit which receives the AC parameter and the first DC parameters sent by a sampling circuit, determines to adjust a first driving signals of the first DC parameters output by the power factor correction circuit under the bi-ring control mode of a voltage outer ring and a current inner ring and output to a drive circuit, receives output DC parameter sent by the sampling circuit, and determines to adjust the driving signals of the DC parameters output by the resonance circuit under the bi-ring control mode of a current outer ring and a voltage inner ring and output to the drive circuit. Rapid switching of voltage/current charging modes is realized, and the quality of output voltage is improved.
Description
Technical field
The present invention relates to charging circuit, particularly a kind of charging circuit and output control method possessing constant voltage or constant current output.
Background technology
World today's environment, energy problem become increasingly conspicuous, and electric automobile becomes the focus of auto industry research, exploitation, but the marketization of electric automobile is still subject to the obstruction of some key technologies.Wherein, a relatively more outstanding technology is exactly the charging technique of electric automobile.
Electric automobile battery charger is the important component part of electric automobile.At present, mostly common circuit for charging machine is the topological structure adopting Active Power Factor Correction (ActivePowerFactorCorrection the is called for short APFC) circuit of prime and isolation DC/DC change-over circuit two parts formation of rear class.Wherein, use the digit chip that two panels is different respectively, control the APFC circuit of prime and the isolation DC/DC change-over circuit of rear class separately, the signal transmission between two panels digit chip needs to add telecommunication circuit and realizes.
The realizing circuit of another kind of charger is that the circuit board of use two equal-wattages composes in parallel a high power module, and use two control chips, need to realize sharing control to two, high power module inside parallel circuits, circuit structure is complicated, and Controller gain variations difficulty is larger simultaneously.
In addition, general charger all possesses constant voltage charge and constant current charge two kinds of mode of operations.Mode of operation can be selected according to different operating states.But when two kinds of mode of operations switch, charger can produce very large dynamic response fluctuation, affects the quality of charger output voltage.
Summary of the invention
The object of the present invention is to provide a kind of charging circuit and output control method, simplify circuit structure, improve the reliability of circuit, achieve rapid/stable switch operating state and export the fast object of dynamic response, improve the quality of charging circuit output voltage.
First aspect, the invention provides a kind of charging circuit, comprising: circuit of power factor correction, resonant circuit, sample circuit, drive circuit and control circuit;
Described circuit of power factor correction, under the control of described control circuit, is converted to the first DC parameter by the alternating-current parameter of reception and exports;
Described resonant circuit, under the control of described control circuit, regulates described first DC parameter received, to obtain output DC parameter;
Described sample circuit, under the control of described control circuit, gathers described alternating-current parameter, the first DC parameter and described output DC parameter, and exports described control circuit to;
Described control circuit, for receiving described alternating-current parameter and described first DC parameter, and adopt the double-loop control pattern of outer voltage and current inner loop, determine the first drive singal of the first DC parameter regulating described circuit of power factor correction to export, and, also for receiving described output DC parameter, and adopt the double-loop control pattern of electric current outer shroud and voltage inter-loop, determine the drive singal of the output DC parameter regulating described resonant circuit, wherein, described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter;
Described drive circuit, for receiving described first drive singal of described control circuit output and described drive singal, and after level and waveform adjustment are carried out to described first drive singal and described drive singal, export described circuit of power factor correction and resonant circuit respectively to.
Second aspect, the invention provides a kind of output control method of charging circuit, and the charging circuit adopting the embodiment of the present invention to provide performs, and described method comprises:
The output voltage parameter of resonant circuit described in described sample circuit Real-time Collection and output current parameter, and gathered output voltage parameter and output current parameter are sent to the control chip included by described control circuit;
Described control chip is regulated output current error by electric current loop, to obtain electric current loop output parameter;
Described control chip is regulated output voltage error by Voltage loop, to obtain the drive singal of described resonant circuit;
Export described drive singal to described drive circuit, adjusted level and the waveform of described drive singal by described drive circuit, export the drive singal after adjustment to described resonant circuit to regulate the output DC parameter of described resonant circuit;
Wherein, described output current error is the difference between default output current reference value and output current parameter, and, described output voltage error is the difference between default output voltage reference value and described electric current loop output parameter and described output voltage parameter, and described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter.
The invention provides a kind of charging circuit and output control method, make the circuit of power factor correction of prime and the resonant circuit of rear class share one piece of control chip, hardware circuit is more simple, improves the reliability of circuit; Signal needed for dual-loop controller computing, by the reprocessing of control chip Direct Sampling, improves real-time of the present invention and operability.The resonant circuit of rear class adopts the double-loop control pattern of electric current outer shroud and voltage inter-loop; achieve the constant voltage charging mode of charging circuit and the quick switching of constant current charging mode; output ripple can be reduced greatly, improve dynamic property and short-circuit protection speed, improve the quality of output voltage.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, introduce doing one to the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of charging circuit that the embodiment of the present invention one provides;
Fig. 2 is the main circuit diagram of a kind of charging circuit that the embodiment of the present invention two provides;
Fig. 3 is the schematic diagram of the dual-loop controller of electric current outer shroud and voltage inter-loop in a kind of charging circuit of providing of the embodiment of the present invention two;
Fig. 4 is the schematic diagram of the dual-loop controller of outer voltage and current inner loop in a kind of charging circuit of providing of the embodiment of the present invention two;
Fig. 5 is the flow chart of the output control method of a kind of charging circuit that the embodiment of the present invention three provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, hereinafter with reference to the accompanying drawing in the embodiment of the present invention, by execution mode, technical scheme of the present invention is described clearly and completely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment one
Fig. 1 is the structural representation of a kind of charging circuit that the embodiment of the present invention one provides.Shown in Figure 1, described charging circuit, comprising: circuit of power factor correction 110, resonant circuit 120, sample circuit 140, drive circuit 150 and control circuit 130;
Described circuit of power factor correction 110, under the control of described control circuit 130, is converted to the first DC parameter by the alternating-current parameter of reception and exports;
Described resonant circuit 120, under the control of described control circuit 130, regulates described first DC parameter received, to obtain output DC parameter;
Described sample circuit 140, under the control of described control circuit 130, gathers described alternating-current parameter, the first DC parameter and described output DC parameter, and exports described control circuit 130 to;
Described control circuit 130, for receiving described alternating-current parameter and described first DC parameter, and adopt the double-loop control pattern of outer voltage and current inner loop, determine the first drive singal of the first DC parameter regulating described circuit of power factor correction 110 to export, and, also for receiving described output DC parameter, and adopt the double-loop control pattern of electric current outer shroud and voltage inter-loop, determine the drive singal of the output DC parameter regulating described resonant circuit 120, wherein, described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter,
Described drive circuit 150, for receiving described first drive singal of described control circuit 130 output and described drive singal, and after level and waveform adjustment are carried out to described first drive singal and described drive singal, export described circuit of power factor correction 110 and resonant circuit 120 respectively to.
Example, described control circuit 130 comprises one piece of control chip and analog to digital conversion circuit; By analog-digital conversion circuit as described, the described alternating-current parameter received, the first DC parameter and described output DC parameter are adjusted to digital signal, and are sent to described control chip.By described control chip, adopt the double-loop control pattern of outer voltage and current inner loop, alternating-current parameter after analog to digital conversion circuit adjustment and the first DC parameter are processed, to determine the first drive singal of the first DC parameter regulating described circuit of power factor correction 110 to export.And, also adopt the double-loop control pattern of electric current outer shroud and voltage inter-loop, the output DC parameter after analog to digital conversion circuit adjustment is adjusted, to determine the drive singal of the output DC parameter regulating described resonant circuit 120.
The operation principle of described charging circuit is: described circuit of power factor correction 110 obtains the alternating-current parameter of input, under the control of described control circuit 130, adjust the input current in described alternating-current parameter, input current waveform is made to follow input voltage waveform, improve input power factor, to the first DC parameter of described resonant circuit 120 stable output.Example, can by the dual-loop controller of described control chip design voltage outer shroud and current inner loop, the first drive singal is exported to drive circuit 150 by the dual-loop controller of described outer voltage and current inner loop, after carrying out level and waveform adjustment by described drive circuit 150, export described circuit of power factor correction 110 to, with the first DC parameter of stable output, and correct input current.
Described resonant circuit 120 receives described first DC parameter, under the control of described control chip, first described first DC parameter is adjusted to square wave, then, higher harmonic current in the first alternating-current parameter after filtering adjustment, is adjusted to output DC parameter by rectification circuit by processing the second alternating-current parameter obtained.Constant direct voltage parameter or constant direct current parameter can be exported according to the use occasion of the charging circuit preset, while the service efficiency improving charging circuit, also achieve the quick charge to battery.Example, described first DC parameter is adjusted to square wave by the bridge inverter main circuit comprised by described resonant circuit 120, again by the higher harmonic current in the first alternating-current parameter after resonant network filtering adjustment, be adjusted to output DC parameter by rectification circuit by processing the second alternating-current parameter obtained.The dual-loop controller of described control chip design current outer shroud and voltage inter-loop can be passed through, by the dual-loop controller output drive signal of described electric current outer shroud and voltage inter-loop to drive circuit 150, after carrying out level and waveform adjustment by described drive circuit 150, export the bridge inverter main circuit of described resonant circuit 120 to.When utilizing this charging circuit for charge in batteries, first select constant current charging mode, and Real-Time Monitoring output dc voltage.When described direct voltage reaches default threshold voltage; control described charging circuit and convert constant voltage charging mode to; and magnitude of voltage is described threshold voltage; adopt double circle controling mode to realize the quick switching of constant voltage charging mode and constant current charging mode, improve dynamic property and short-circuit protection speed.
The closed loop feedback adopting one piece of control chip to realize described circuit of power factor correction 110 and described resonant circuit 120 respectively controls, compared with the employing independent control technology of front and back stages or double circuit board control program, hardware circuit is more simple, improves the reliability of circuit; Signal needed for computing, by the reprocessing of control chip Direct Sampling, improves real-time of the present invention and operability.Example, described control chip can comprise the chip that dsp controller or MCU (MicrocontrollerUnit, micro-control unit) etc. have digital signal processing function.
The charging circuit that the present embodiment provides, carries out the double-loop control of outer voltage and current inner loop, with the first DC parameter of stable output to described circuit of power factor correction 110 by one piece of control chip; By described control chip, described resonant circuit 120 is carried out to the double-loop control of electric current outer shroud and voltage inter-loop; to realize the quick switching of constant voltage charging mode and constant current charging mode, ripple, raising dynamic property and the short-circuit protection speed reduced in output DC parameter, improve the quality of output voltage.
Embodiment two
Fig. 2 is the main circuit diagram of a kind of charging circuit that the embodiment of the present invention two provides.Described main circuit is illustrating, herein not as qualifications a kind of concrete realizing circuit of the charging circuit that embodiment one provides.
Shown in Figure 2, described charging circuit comprises EMC circuit 200, circuit of power factor correction 110, resonant circuit 120, sample circuit (can adopt sample circuit of the prior art, do not draw physical circuit figure), PFC drive circuit (can adopt PFC drive circuit of the prior art, do not draw physical circuit figure), full bridge driving circuit (full bridge driving circuit of the prior art can be adopted, do not draw physical circuit figure) and dsp chip 210.Wherein, described EMC circuit 200 comprises: the first electric capacity C1, common mode inductance, the second electric capacity C2 and the 3rd electric capacity C3; The two ends of described first electric capacity C1 are electrically connected with the output of alternating current; The first end of described common mode inductance is electrically connected with one end of described first electric capacity C1, and the second end of described common mode inductance is electrically connected with the other end of described first electric capacity C1, and the 3rd end of described common mode inductance is electrically connected with one end of described second electric capacity C2; Described second electric capacity C2 connects with described 3rd electric capacity C3, and the common end grounding of described second electric capacity C2 and described 3rd electric capacity C3; The other end of described 3rd electric capacity C3 is electrically connected with the 4th end of described common mode inductance.
Described circuit of power factor correction 110 comprises: the first commutation sub-circuit, the first inductance L 1, first switching tube Q1 (can be an insulating gate type field effect tube or an insulated gate bipolar transistor), the first diode D1 and the 4th electric capacity C4; The described input of the first commutation sub-circuit is electrically connected with the output of alternating current, and the first output of described first commutation sub-circuit is electrically connected with one end of the first inductance L 1; The other end of described first inductance L 1 is electrically connected with the first end (drain electrode) of the first switching tube Q1 and the positive pole of the first diode D1 respectively, and second end (source electrode) of described first switching tube Q1 is electrically connected with the second output of described first commutation sub-circuit; The negative pole of described first diode D1 is electrically connected with one end of the 4th electric capacity C4, and the other end of described 4th electric capacity C4 is electrically connected with second end (source electrode) of described first switching tube Q1; The control end (grid) of described first switching tube Q1 is electrically connected with described PFC drive circuit.
Described resonant circuit 120 comprises: bridge inverter main circuit, the second inductance L 2, transformer T1, the second commutation sub-circuit, the 5th electric capacity C5 and the 6th electric capacity C6.
Described bridge inverter main circuit, under the control of described control circuit 130, is converted to the first alternating-current parameter by described first DC parameter received; Wherein, described bridge inverter main circuit comprises at least two insulating gate type field effect tubes or insulated gate bipolar transistor.Example, the switching frequency of described insulating gate type field effect tube or insulated gate bipolar transistor is 45KHz ~ 300KHz.
Described second inductance L 2, transformer T1 and the 5th electric capacity C5 form resonant network, for the higher harmonic current in the first alternating-current parameter described in filtering, export described second commutation sub-circuit to by processing the second alternating-current parameter obtained.
By described second commutation sub-circuit, described second alternating-current parameter is adjusted to output DC parameter, and by the 6th electric capacity C6, filtering process is carried out to described output DC parameter.
The circuit connecting relation of described resonant circuit 120 is: the input of described bridge inverter main circuit is electrically connected with the two ends of described 4th electric capacity C4; First output of described bridge inverter main circuit is electrically connected with one end of the second inductance L 2; The other end of described second inductance L 2 is connected with the one end on the former limit of described transformer T1, the other end on the former limit of described transformer T1 is connected with one end of the 5th electric capacity C5, and the described other end of the 5th electric capacity C5 is electrically connected with the second output of described bridge inverter main circuit; The secondary of described transformer T1 is electrically connected with the input of described second commutation sub-circuit, the output of described second commutation sub-circuit is electrically connected with the two ends of the 6th electric capacity C6, the two ends of described 6th electric capacity C6 are output, can connect storage battery and wait for charging device.
Described dsp chip 210, carries out computing for the input voltage parameter to described circuit of power factor correction 110, input current parameter and the first DC parameter, to obtain the first drive singal.Export described first drive singal to PFC drive circuit, and controlled conducting or the cut-off of the first switching tube Q1 in described circuit of power factor correction 110 by described PFC drive circuit, with the first DC parameter regulating described circuit of power factor correction 110 to export.And, also for carrying out computing, to obtain drive singal to the output voltage parameter of described resonant circuit 120 and output current parameter.Export described drive singal to full bridge driving circuit, controlled the bridge inverter main circuit of described resonant circuit 120 by described full bridge driving circuit.
The processing unit of described dsp chip 210 comprises: parameter presets subelement, the first process subelement and the second process subelement.
Described parameter presets subelement, for arranging the first voltage reference value of described circuit of power factor correction 110, and, also for arranging the second output voltage reference value and the second output current reference value of described resonant circuit 120.
Described first process subelement, adoption rate integral algorithm regulates the first output voltage error, to obtain Voltage loop output parameter, using the current reference value of the product of described Voltage loop output parameter and described input voltage parameter as electric current loop, adoption rate integral algorithm regulates the first input current error, to obtain the drive singal of described circuit of power factor correction 110.Wherein, the first output voltage error is the difference between described first DC parameter and described first voltage reference value, and the first input current error is the difference between described input current parameter and the current reference value of described electric current loop.
Described second process subelement, adoption rate integral algorithm regulates the second output current error, and to obtain electric current loop output parameter, adoption rate integral algorithm regulates the second output voltage error, to obtain the drive singal of described resonant circuit 120.Wherein, second output voltage error is the difference between described second output voltage reference value and electric current loop output parameter and the second output voltage parameter, and the second output current error is the difference between described output current parameter and described second output current reference value.
Example, by described first process subelement, closed loop feedback control is carried out to described circuit of power factor correction 110, refer to the schematic diagram of the dual-loop controller of outer voltage and current inner loop in a kind of charging circuit that Fig. 4 provides.In figure, by carrier amplitude Vm, inductive current forms open-loop transfer function to the function G igd of duty ratio D and inductive current to the impedance Z L of output voltage.
Carry out sampling by voltage sample function Hv (s) to the first DC parameter and obtain Vfb, the difference between calculating Vfb and described first voltage reference value Vref is as the first output voltage error Ve.Obtain the first adjusted value by Ve and Voltage loop penalty function Gcv (s), limit acquisition Voltage loop output parameter by carrying out scope to described first adjusted value.Using the current reference value Iref of the product of Voltage loop output parameter and described input voltage parameter as electric current loop.By current sample function Hi (s), sampling is carried out to inductive current and obtain input current parameter Ifb, calculate difference between described current reference value Iref and described input current parameter Ifb as the first input current error Ie.Described first input current error Ie carries out superposing a modulating wave after proportion adjustment and integral adjustment again through electric current loop penalty function Gci (s), by the wave form output after superposition to PFC drive circuit.Controlled the switching frequency of described first switching tube Q1 by described PFC drive circuit, to correct the input current waveform of described circuit of power factor correction 110, improve PF value, and stablize the first DC parameter.Wherein, described modulating wave is the output waveform of described first commutation sub-circuit.If the mode of superposition modulated ripple is added, then described modulating wave is the waveform contrary with the output half-wave of described first commutation sub-circuit.If the mode of superposition modulated ripple is subtracted each other, then described modulating wave is the waveform identical with the output half-wave of described first commutation sub-circuit.
By described second process subelement, closed loop feedback control is carried out to described resonant circuit 120, refer to the schematic diagram of the dual-loop controller of electric current outer shroud and voltage inter-loop in a kind of charging circuit that Fig. 3 provides.In figure, voltage controlled oscillator function G vco (s) and control variables are open-loop transfer function to the transfer function Gvws (s) of output voltage variable quantity.
Export DC parameter by sampling function H (s) collection and obtain output current parameter If, calculate difference between described output current parameter And if described second output current reference value Iref as the second output current error.By current loop controller Gctrl_I (s), proportion adjustment and integral adjustment acquisition electric current loop output parameter Icrtl are carried out to described second output current error.Export DC parameter by sampling function H (s) collection and obtain the second output voltage parameter Uf.The difference calculated between the second output voltage reference value Uref and electric current loop output parameter Icrtl and the second output voltage parameter Uf obtains the second output voltage error.Described second output voltage error is output drive signal extremely described full bridge driving circuit after Voltage loop controller Gctrl_V (s) regulates, with stable output DC parameter.Wherein, current loop controller Gctrl_I (s)=, ki_p is proportionality coefficient, and ω i_z compensates zero point, and ki_p* ω i_z is integral coefficient.Voltage loop controller Gctrl_V (s)=, kv_p is proportionality coefficient, and ω v_z compensates zero point, and kv_p* ω v_z is integral coefficient.
PFC drive circuit, receives the first drive singal that described dsp chip 210 sends, and after carrying out level and waveform adjustment, the first drive singal after adjustment is exported to the first switching tube Q1 of described circuit of power factor correction 110, to adjust the first DC parameter;
Full bridge driving circuit, receives the drive singal that described dsp chip 210 sends, and after carrying out level and waveform adjustment, the drive singal after adjustment is exported to the bridge inverter main circuit of described resonant circuit 120, to adjust output DC parameter.
The charging circuit that the present embodiment provides, carries out the double-loop control of outer voltage and current inner loop, with the first DC parameter of stable output to described circuit of power factor correction 110 by a DSP digitial controller; By described DSP digitial controller, described resonant circuit 120 is carried out to the double-loop control pattern of electric current outer shroud and voltage inter-loop.Described DSP digitial controller can according to the change of load variations and output voltage, efficiently, reliably adjustment export the drive singal of described resonant circuit 120 to.This charging circuit is applied on Vehicular charger, vehicle-mounted charge engine efficiency can be made up to more than 94%, simultaneously this charger device not only compact conformation, and lightweight, and dynamic response is fast, and control method is simple.
Embodiment three
Fig. 5 is the flow chart of the output control method of a kind of charging circuit that the embodiment of the present invention three provides.The charging circuit that the method for the present embodiment adopts the above embodiment of the present invention to provide performs, to realize the switching fast, stably between the constant direct voltage parameter of response and constant direct current parameter.
Shown in Figure 5, the output control method of the charging circuit that above-described embodiment provides, comprises the steps:
The output voltage parameter of resonant circuit described in S501, described sample circuit Real-time Collection and output current parameter, and gathered output voltage parameter and output current parameter are sent to the control chip included by described control circuit.
S502, described control chip are regulated output current error by electric current loop, to obtain electric current loop output parameter.
Wherein, described output current error is the difference between default output current reference value and output current parameter.Output current reference value can be set by the mode of artificial input or the mode selected from the parameter of system default.By current controller, proportion adjustment and integral adjustment acquisition electric current loop output parameter are carried out to described output current error.
S503, described control chip are regulated output voltage error by Voltage loop, to obtain the drive singal of described resonant circuit.
Wherein, described output voltage error is the difference between default output voltage reference value and described electric current loop output parameter and described output voltage parameter, and described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter.Output voltage reference value can be set by the mode of artificial input or the mode selected from the parameter of system default.By voltage controller, the drive singal that proportion adjustment and integral adjustment obtain described resonant circuit is carried out to described output voltage error.
S504, export described drive singal to described drive circuit, adjusted level and the waveform of described drive singal by described drive circuit, export the drive singal after adjustment to described resonant circuit to regulate the output DC parameter of described resonant circuit.
The output control method of the charging circuit that the present embodiment provides; controlled by the closed loop feedback of described resonant circuit being carried out to electric current outer shroud and voltage inter-loop; the object achieving the quick switching of constant voltage charging mode and constant current charging mode, reduce the ripple exported in DC parameter, improve dynamic property and short-circuit protection speed, improves the quality of output voltage.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (6)
1. a charging circuit, is characterized in that, comprising: circuit of power factor correction, resonant circuit, sample circuit, drive circuit and control circuit;
Described circuit of power factor correction, under the control of described control circuit, is converted to the first DC parameter by the alternating-current parameter of reception and exports;
Described resonant circuit, under the control of described control circuit, regulates described first DC parameter received, to obtain output DC parameter;
Described sample circuit, under the control of described control circuit, gathers described alternating-current parameter, the first DC parameter and described output DC parameter, and exports described control circuit to;
Described control circuit, for receiving described alternating-current parameter and described first DC parameter, and adopt the double-loop control pattern of outer voltage and current inner loop, determine the first drive singal of the first DC parameter regulating described circuit of power factor correction to export, and, also for receiving described output DC parameter, and adopt the double-loop control pattern of electric current outer shroud and voltage inter-loop, determine the drive singal of the output DC parameter regulating described resonant circuit, wherein, described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter;
Described drive circuit, for receiving described first drive singal of described control circuit output and described drive singal, and after level and waveform adjustment are carried out to described first drive singal and described drive singal, export described circuit of power factor correction and resonant circuit respectively to.
2. charging circuit according to claim 1, is characterized in that, described control circuit comprises one piece of control chip and analog to digital conversion circuit;
Described control chip, for adopting the double-loop control pattern of outer voltage and current inner loop, alternating-current parameter after analog to digital conversion circuit adjustment and the first DC parameter are processed, to determine the first drive singal of the first DC parameter regulating described circuit of power factor correction to export, and, also for adopting the double-loop control pattern of electric current outer shroud and voltage inter-loop, output DC parameter after analog to digital conversion circuit adjustment is adjusted, to determine the drive singal of the output DC parameter regulating described resonant circuit.
3. charging circuit according to claim 2, is characterized in that, described control chip comprises:
Parameter presets subelement, the first process subelement and the second process subelement;
Described parameter presets subelement, for arranging the first voltage reference value of described circuit of power factor correction, and, also for arranging the second output voltage reference value and the second output current reference value of described resonant circuit;
Described first process subelement, adoption rate integral algorithm regulates the first output voltage error, to obtain Voltage loop output parameter, using the current reference value of the product of described Voltage loop output parameter and described input voltage parameter as electric current loop, adoption rate integral algorithm regulates the first input current error, to obtain the drive singal of described circuit of power factor correction, wherein, first output voltage error is the difference between described first DC parameter and described first voltage reference value, and, first input current error is the difference between described input current parameter and the current reference value of described electric current loop,
Described second process subelement, adoption rate integral algorithm regulates the second output current error, to obtain electric current loop output parameter, adoption rate integral algorithm regulates the second output voltage error, to obtain the drive singal of described resonant circuit, wherein, second output voltage error is the difference between described second output voltage reference value and electric current loop output parameter and the second output voltage parameter, and the second output current error is the difference between described output current parameter and described second output current reference value.
4. charging circuit according to claim 1, is characterized in that, described resonant circuit at least comprises bridge inverter main circuit, resonant network and rectification circuit;
Described bridge inverter main circuit, under the control of described control circuit, is converted to the first alternating-current parameter by described first DC parameter received;
Described resonant network, for the higher harmonic current in the first alternating-current parameter described in filtering, exports described rectification circuit to by processing the second alternating-current parameter obtained;
Described rectification circuit, for being adjusted to output DC parameter by described second alternating-current parameter.
5. charging circuit according to claim 4, it is characterized in that, described bridge inverter main circuit comprises at least two insulating gate type field effect tubes or insulated gate bipolar transistor, and wherein, the switching frequency of described insulating gate type field effect tube or insulated gate bipolar transistor is 45KHz ~ 300KHz;
Described resonant network comprises with the electric capacity of serial or parallel connection form connection and transformer.
6. an output control method for charging circuit, adopts the arbitrary described charging circuit of claim 1-5 to perform, it is characterized in that, comprising:
The output voltage parameter of resonant circuit described in described sample circuit Real-time Collection and output current parameter, and gathered output voltage parameter and output current parameter are sent to the control chip included by described control circuit;
Described control chip is regulated output current error by electric current loop, to obtain electric current loop output parameter;
Described control chip is regulated output voltage error by Voltage loop, to obtain the drive singal of described resonant circuit;
Export described drive singal to described drive circuit, adjusted level and the waveform of described drive singal by described drive circuit, export the drive singal after adjustment to described resonant circuit to regulate the output DC parameter of described resonant circuit;
Wherein, described output current error is the difference between default output current reference value and output current parameter, and, described output voltage error is the difference between default output voltage reference value and described electric current loop output parameter and described output voltage parameter, and described output DC parameter at least comprises constant direct current parameter or constant direct voltage parameter.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978355A (en) * | 2016-07-01 | 2016-09-28 | 深圳硅山技术有限公司 | Electric automobile vehicle-mounted DC/DC apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978355A (en) * | 2016-07-01 | 2016-09-28 | 深圳硅山技术有限公司 | Electric automobile vehicle-mounted DC/DC apparatus |
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| WO2022246615A1 (en) * | 2021-05-24 | 2022-12-01 | 深圳欣锐科技股份有限公司 | Charger circuit |
| CN114285118A (en) * | 2021-12-20 | 2022-04-05 | 武汉蔚能电池资产有限公司 | Battery parameter correction system, method and storage medium |
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| CN104901404B (en) | 2017-06-09 |
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